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Publication numberUS5183053 A
Publication typeGrant
Application numberUS 07/685,466
Publication dateFeb 2, 1993
Filing dateApr 12, 1991
Priority dateApr 12, 1991
Fee statusPaid
Publication number07685466, 685466, US 5183053 A, US 5183053A, US-A-5183053, US5183053 A, US5183053A
InventorsCharles R. Yeh, Donald H. Huldin
Original AssigneeAcuderm, Inc.
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Elliptical biopsy punch
US 5183053 A
Abstract
The disposable punch of the present invention is of a simple two-piece construction where the first piece is a molded plastic handle portion having an elongated shape designed to be grasped by the surgeon. The handle portion terminates in a receptacle which receives the blade of the biopsy punch. In cross-section, the blade has an elliptical shape and terminates in a cutting edge that lies in a single plate. The blade is force fit into the receptacle of the handle portion and is maintained in this position by a friction fit.
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Claims(7)
What is claimed is:
1. A disposable surgical instrument in the form of a biopsy punch for making an elliptical incision in the skin to remove skin abnormalities, comprising:
(a) an elongated handle member formed of a hard plastic material including a means for retaining a cutting member formed integrally on one end of said handle member; and
(b) a cutting member retained by said retaining means and projecting therefrom to expose a cutting surface for making the incision, said cutting member having a first and second portion, said first portion being disposed within said retaining means and being substantially annular in cross-section and said second portion being generally elliptical in cross-section.
2. The surgical instrument according to claim 1, wherein said cutting member extends a uniform distance from said means for retaining.
3. The surgical instrument according to claim 1, wherein said retaining means includes a receptacle dimensioned to receive said cutting member.
4. The surgical instrument according to claim 1, wherein said cutting member is composed of surgical steel.
5. The surgical instrument according to claim 1, wherein said first portion of the cutting member is force fit and frictionally retained within said retaining means.
6. The surgical instrument of claim 1, wherein said cutting surface is formed on the second portion and consists of a razor sharp blade.
7. The surgical instrument according to claim 1, wherein said elongated handle member is formed with a rim for receiving the punching force.
Description
BACKGROUND OF THE INVENTION

The present invention relates generally to surgical instruments and, more particularly, to an elliptical skin biopsy punch. As is well-known in the art, abnormalities found on the surface of the skin, such as tumors or lesions, are removed by a simple surgical procedure for further examination and analysis. Traditionally, this surgical procedure was performed "free-hand" by a surgeon using a scalpel. An incision was made around the skin abnormality to create an isolated piece of skin that was lifted by forceps to expose the underlying tissue. The tissue would then be cut away by a scalpel or scissors such that the abnormality could be removed. Typically, an elliptical incision was made about the skin abnormality so that the wound would heal with the least amount of visible scarring. The elliptical incision also accelerated the healing process because the exposed surfaces of the wound could be evenly joined together with a minimum stretching of the skin.

While such a surgical procedure was relatively simple, it was difficult for the surgeon to make precise elliptical incisions around the skin abnormality such that the healing benefits provided by an elliptical incision were not always realized. In an attempt to obviate this problem, surgical incision guides were devised. One such example of a guide is shown in U.S. Pat. No. 4,192,312 issued to Wilson. Wilson shows a patch of material which acts as a template and is placed over the skin abnormality so as to guide the scalpel while the surgeon made the free-hand incision. While such a device lessened the problems associated with free-hand incisions, making precise cuts was still dependent on the skill of the individual surgeon. Moreover, the incision guides did nothing to insure that the scalpel cut at a uniform depth such that removed tissue had a uniform thickness. Obtaining a tissue sample of uniform thickness is critical for the performance of pathological analysis and diagnosis.

As a result, skin biopsy punches were developed which could consistently make a uniform incision around a skin abnormality. One such skin biopsy punch, also referred to as a circular punch, contained an incision blade which was circular in shape. Such circular punches, when used to remove skin lesions, created an oval-like defect after use. If the oval-like defect was sufficiently small, the wound would be allowed to heal. However, larger incisions would require closure which would result in "dog ears" on each of the oval ends of the defect. The surgeon would be required to notch the oval ends of the defect, creating a linear defect which could then be closed by suture or staple. A circular skin biopsy punch is shown in U.S. Pat. No. 3,515,128 issued to McEvoy.

In U.S. Pat. No. 3,990,451, issued to Gibbs, a surgical instrument for removing skin lesions having a navicular shape was developed. However, the incision blade of Gibbs is difficult to manufacture because it has a complex convex cutting edge. Moreover, the Gibbs device is difficult to use because the surgeon must rock the convex cutting head across the surface of the skin to make the incision. The shape of the cutting head and the required rocking action make it difficult to remove a specimen having a uniform thickness as the specimen will be thicker at its middle than at its ends. Thus, an elliptical biopsy punch that has a simpler and less expensive construction and is simpler to use than the Gibbs device is desired.

BRIEF DESCRIPTION OF THE INVENTION

The biopsy punch of the present invention overcomes the above-noted shortcomings by providing a punch that is simple and economical to manufacture and easy to use. The disposable punch of the present invention is of a simple two-piece construction where the first piece is a molded plastic handle portion having an elongated shape designed to be grasped by the surgeon. The handle portion terminates in a receptacle which receives the blade of the biopsy punch. In cross-section, the blade has an elliptical shape and terminates in a razor sharp cutting edge that lies in a single plane. The blade is force fit into the receptacle of the handle portion and is maintained in this position by a friction fit. The biopsy punch of the present invention has a simple and economical construction, yet provides a consistent elliptical incision of uniform depth. Because of the simplicity of the design of the invention, the biopsy punch is inexpensive to manufacture and, therefore, can be disposed of after use.

OBJECTS OF THE INVENTION

It is a general object of the invention to provide an improved elliptical biopsy punch.

It is another object of the invention to provide an elliptical biopsy punch that makes an incision of constant and uniform depth to provide a tissue specimen having a uniform thickness for accurate diagnosis.

It is a further object of the invention to provide a biopsy punch that facilitates the closing of the wound and minimizes scarring.

It is yet another object of the invention to provide a biopsy punch having a simple and economical design.

It is a further object of the invention to provide a biopsy punch that is inexpensive to manufacture such that it can be made disposable.

It is still a further object of the invention to provide an elliptical biopsy punch having a blade that makes the surgical procedure simple to perform.

Other objects of the invention, in addition to those set forth above, will become apparent to one of ordinary skill in the art from the following detailed description of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a side view of the biopsy punch of the invention.

FIG. 2 shows a longitudinal section view of the biopsy punch of the invention.

FIG. 3 is a section view of the blade of the biopsy punch of the invention, taken along line 3--3 of FIG. 1.

DETAILED DESCRIPTION OF THE INVENTION

Referring more particularly to FIGS. 1 and 2, the biopsy punch of the invention 1 consists of a handle portion 2 formed of a rigid plastic material. Handle portion 2 includes an upper section 3 having ridges formed thereon which enhance the surgeon's grip. A middle section 5 having a smooth outer surface joins the upper section 3 to a lower section 7. Lower section 7 includes an enlarged cylindrical receptacle 9 such that a rim 11 is formed where the surgeon can apply pressure to perform the punching operation. Handle 3 is made hollow to form passage 4 and has an aperture 6 formed at the top thereof allowing access to the interior of the punch. Passage 4 is provided to allow the surgeon to push the specimen out of the blade 13 from the inside, if necessary.

Referring more particularly to FIGS. 1, 2 and 3, surgical blade 13 has a first portion 13a of generally annular cross-section disposed within receptacle 9 and a second portion 13b having an elliptical cross-section. Blade 13 is composed of surgical steel and is dimensioned such that a tight friction fit results between first portion 13a and receptacle 9 to retain the blade in the handle portion 2. It will be appreciated that a mechanical connection can be used to join the blade 13 and handle portion 2 rather than a friction fit. For example, the plastic handle could be integrally formed over a portion of the blade 13 during the manufacturing process. The razor sharp cutting edge 15 of blade 13 has an elliptical profile as shown most clearly in FIG. 3. Moreover, the second portion 13b extends from the receptacle a uniform distance such that the cutting edge 15 is disposed in a plane perpendicular to the longitudinal axis of handle 3 and, in side view, forms a straight line. It will be understood by one of ordinary skill in the art that the elliptical cutting edge can be dimensioned as required so as to circumscribe skin abnormalities of various sizes.

To construct the biopsy punch of the invention, the handle portion 2 is first extruded from a rigid plastic material as is well known in the art. The preformed blade 13 is then press fit into receptacle 9 to form an integral unit therewith. As is evident from the foregoing description, the construction and assembly of the punch of the invention is simple and inexpensive. As a result, punch 1 can be disposed of after use such that a new sterile punch can be used for each surgical procedure.

In operation, the cutting edge 15 of blade 13 is placed on the skin such that it circumscribes the skin abnormality that is to be removed. A substantially downward force is applied to the blade by the surgeon via rim 11 such that the cutting edge 15 severs the skin surrounding the abnormality to create an incision having a uniform depth. A slight vibration motion may be employed to create the incision, if necessary. The surgeon then cuts the severed tissue from the tissue underlying it so the specimen can be removed and analyzed. As is evident from the foregoing description, the resulting incision will have a generally elliptical shape such that the joining of the opposite sides of the incision to one another can be done easily with a minimal amount of stretching of the skin or deformation of the incision. Thus, the punch of the invention allows the surgeon to quickly and easily perform the biopsy incision while minimizing scarring effects and facilitating the healing of the wound. Moreover, because the punch consistently creates to an incision having a uniform depth, the biopsy specimen removed will be of better quality and undercutting of the biopsy specimen will be minimized.

While the embodiments of this invention have been shown and described in some detail, it will be understood that this description and the accompanying drawings are offered merely by way of example, and that the invention is to be limited in scope only by the appended claims.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2690750 *Jul 13, 1953Oct 5, 1954Steinberg Marvin DSurgical instrument for treating ingrowing nails
US3512519 *Oct 26, 1967May 19, 1970Hall Robert MAnatomical biopsy sampler
US3577979 *Feb 6, 1968May 11, 1971Harry Van Der GaastDisposable surgical skin punch
US3990451 *May 15, 1975Nov 9, 1976Gibbs Stephen DSurgical instrument
US4007732 *Sep 2, 1975Feb 15, 1977Robert Carl KvavleMethod for location and removal of soft tissue in human biopsy operations
US4059115 *Jun 14, 1976Nov 22, 1977Georgy Stepanovich JumashevSurgical instrument for operation of anterior fenestrated spondylodessis in vertebral osteochondrosis
US4099518 *May 10, 1976Jul 11, 1978Baylis Shelby MBiopsy apparatus
US4649918 *Jun 18, 1982Mar 17, 1987Custom Medical Devices, Inc.Bone core removing tool
US4832045 *Mar 18, 1988May 23, 1989Goldberger Robert EBiopsy instrument
DE3525917A1 *Jul 19, 1985Feb 13, 1986Leonardo CorcosSurgical instrument for the removal of small varices
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5330495 *May 24, 1993Jul 19, 1994The United States Of America As Represented By The Secretary Of The Air ForceDisposable grafting knife
US5441041 *Sep 13, 1993Aug 15, 1995United States Surgical CorporationOptical trocar
US5467762 *Oct 6, 1993Nov 21, 1995United States Surgical CorporationOptical trocar
US5507765 *Apr 28, 1994Apr 16, 1996Mott; James B.Punch-type surgical instrument for skin incision, set of parts for making such an instrument of selectably variable size, and blade unit for such instrument
US5569160 *Mar 21, 1995Oct 29, 1996United States Surgical CorporationOptical trocar
US5570700 *Oct 3, 1994Nov 5, 1996Vogeler; Douglas M.Elliptical biopsy punch
US5658236 *Mar 21, 1995Aug 19, 1997United States Surgical CorporationOptical trocar
US5690664 *Sep 18, 1996Nov 25, 1997United States Surgical CorporationTrocar having movable blade
US5792163 *Jul 12, 1996Aug 11, 1998Hitzig; GaryFor utilization in transplanting of human hair follicles in a patient
US5827199 *Jun 24, 1996Oct 27, 1998Alexander; A. MelvinBiopsy punch apparatus
US5848978 *Nov 14, 1995Dec 15, 1998Genx International, Inc.Surgical biopsy device
US5961529 *Jan 12, 1998Oct 5, 1999Arnold; James E.Method for transplanting grafts of skin having hair
US6022367 *Jun 18, 1997Feb 8, 2000United States SurgicalSurgical apparatus for forming a hole in a blood vessel
US6036710 *Sep 19, 1997Mar 14, 2000United States SurgicalApparatus for formation of a hole in a blood vessel
US6685630Apr 5, 2002Feb 3, 2004United States Surgical CorporationOptical trocar
US6702821Aug 28, 2001Mar 9, 2004The Bonutti 2003 Trust AInstrumentation for minimally invasive joint replacement and methods for using same
US6770078Oct 11, 2001Aug 3, 2004Peter M. BonuttiMovable knee implant and methods therefor
US7104996Jul 8, 2002Sep 12, 2006Marctec. LlcMethod of performing surgery
US7322933Feb 9, 2005Jan 29, 2008United States Surgical CorporationOptical trocar
US7510557Jan 18, 2005Mar 31, 2009Bonutti Research Inc.Cutting guide
US7615054Dec 3, 2003Nov 10, 2009Martec, LLCBicompartmental knee implant and method
US7621933May 31, 2006Nov 24, 2009Restoration Robotics, Inc.Tool assembly for harvesting and implanting follicular units
US7621934May 31, 2006Nov 24, 2009Restoration Robotics, IncMethods of harvesting and implanting follicular units using a coaxial tool
US7635390Oct 8, 2003Dec 22, 2009Marctec, LlcJoint replacement component having a modular articulating surface
US7670342 *Jan 25, 2006Mar 2, 2010Warsaw Orthopedic, Inc.Osteochondral implant procedure and device
US7704253Mar 6, 2006Apr 27, 2010Howmedica Osteonics Corp.Single use resection guide
US7708740Jun 30, 2005May 4, 2010Marctec, LlcMethod for total knee arthroplasty and resecting bone in situ
US7708741Jun 30, 2005May 4, 2010Marctec, LlcMethod of preparing bones for knee replacement surgery
US7744544Dec 9, 2005Jun 29, 2010Huot Instruments, LlcDermal incisor
US7749229Jun 30, 2005Jul 6, 2010Marctec, LlcTotal knee arthroplasty through shortened incision
US7785339Aug 9, 2005Aug 31, 2010Innovia, LlcTool for coring portions of one or more hair follicles
US7806896Nov 25, 2003Oct 5, 2010Marctec, LlcKnee arthroplasty method
US7806897Jun 30, 2005Oct 5, 2010Marctec, LlcKnee arthroplasty and preservation of the quadriceps mechanism
US7811225Jan 28, 2008Oct 12, 2010Tyco Healthcare Group LpOptical trocar
US7828852Mar 9, 2007Nov 9, 2010Marctec, Llc.Inlaid articular implant
US7837736Oct 30, 2007Nov 23, 2010Marctec, LlcMinimally invasive surgical systems and methods
US7892236Jan 18, 2005Feb 22, 2011Marctec, LlcSystem and method for total joint replacement
US7959635Mar 8, 2004Jun 14, 2011Marctec, Llc.Limited incision total joint replacement methods
US7962192Apr 28, 2006Jun 14, 2011Restoration Robotics, Inc.Systems and methods for aligning a tool with a desired location or object
US8128647Dec 19, 2008Mar 6, 2012Kennedy John SSurgical instrument for detecting, isolating and excising tumors
US8133229Oct 14, 2003Mar 13, 2012Marctec, Llc.Knee arthroplasty method
US8133237Mar 18, 2008Mar 13, 2012Restoration Robotics, Inc.Biological unit removal tools with concentric tubes
US8133247Oct 12, 2009Mar 13, 2012Restoration Robotics, Inc.Tool assembly for harvesting and implanting follicular units
US8211116Mar 18, 2008Jul 3, 2012Restoration Robotics, Inc.Harvesting tools for biological units
US8211117Dec 9, 2008Jul 3, 2012Hsc Development LlcFollicular extraction method and device
US8226664Mar 13, 2009Jul 24, 2012Restoration Robotics, Inc.Biological unit removal tools with movable retention member
US8251915Mar 23, 2009Aug 28, 2012University Of MassachusettsDermal punch device
US8535299Jul 5, 2005Sep 17, 2013Joseph GiovannoliMethod and apparatus for skin reduction
US8545489Jul 13, 2006Oct 1, 2013Joseph GiovannoliMethod and apparatus for skin reduction
US8622925Aug 27, 2012Jan 7, 2014University Of MassachusettsDermal punch device
US8690894May 20, 2011Apr 8, 2014Restoration Robotics, Inc.Automated system for harvesting or implanting follicular units
US8696686Jun 26, 2012Apr 15, 2014Restoration Robotics, Inc.Biological unit removal tools with movable retention member
US8814882Mar 18, 2008Aug 26, 2014Restoration Robotics, Inc.Biological unit removal tools with retention mechanism
USRE42381Oct 28, 2008May 17, 2011Restoration Robotics, Inc.Hair transplantation method and apparatus
USRE42437Feb 5, 2007Jun 7, 2011Restoration Robotics, Inc.Hair transplantation method and apparatus
USRE42438Oct 28, 2008Jun 7, 2011Restoration Robotics, Inc.Hair transplantation method and apparatus
DE4418676A1 *May 28, 1994Sep 14, 1995Constantin Dr LandesExcision punch to excise skin impurities
DE102011116807A1Oct 25, 2011Apr 25, 2013Raiedah Ahmed M. AlmohammadiMedizinisches Schneidwerkzeug
WO2005027758A2 *Sep 16, 2004Mar 31, 2005Univ Massachusetts MedicalDermal punch device
WO2007070279A1Dec 4, 2006Jun 21, 2007Huot Instr LlcDermal incisor
WO2013060797A1Oct 25, 2012May 2, 2013Almohammadi Raiedah Ahmed MMedical cutting tool
Classifications
U.S. Classification600/567, 606/167
International ClassificationA61B17/32, A61B10/00
Cooperative ClassificationA61B17/32053, A61B10/00
European ClassificationA61B10/00, A61B17/3205G
Legal Events
DateCodeEventDescription
Aug 2, 2004FPAYFee payment
Year of fee payment: 12
Jul 25, 2000FPAYFee payment
Year of fee payment: 8
Mar 4, 1996FPAYFee payment
Year of fee payment: 4
May 20, 1991ASAssignment
Owner name: ACUDERM, INC.
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:HULDIN, DONALD H.;REEL/FRAME:005700/0994
Effective date: 19910509
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:YEH, CHARLES R.;REEL/FRAME:005700/0992
Effective date: 19910513